VARIABLE GEAR RATIO STEERING SYSTEM, Diagnostic DTC:C15B4/71

DTC Code DTC Name
C15B4/71 ECU Malfunction(Actuator Angle Record)

DESCRIPTION

If the VGRS ECU (front steering control ECU) detects an internal malfunction, it turns the master warning light on, and stores DTC C15B4/71.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition
C15B4/71 ECU Malfunction(Actuator Angle Record) The memorized actuator angle value cannot be confirmed immediately after the engine switch is turned on (IG). VGRS ECU (front steering control ECU) Comes on After clearing DTCs, perform actuator angle neutral point calibration.

CAUTION / NOTICE / HINT

Note


  • When replacing the VGRS ECU (front steering control ECU), perform actuator angle neutral point calibration and initialization after replacement.

    Click here

  • Since DTC C1B09/19 is stored in the DRS ECU (rear steering control ECU), after performing repairs on the VGRS system, clear the DTCs for the dynamic rear steering system.

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  • When DTC C15B4/71 is output, confirm the following:

    (a)Whether there was any trouble starting the engine during the trip before DTC C15B4/71 was stored.

    (b)Whether the master warning light illuminated while the vehicle was being driven or immediately after the engine was started.

PROCEDURE


  1. PERFORM VGRS SYSTEM CALIBRATION


    1. Perform VGRS system calibration.

      Click here

      Result
      Result Proceed to
      Actuator angle neutral point calibration can be performed A
      Actuator angle neutral point calibration cannot be performed B

    A

    END

    B

    REPLACE VGRS ECU (FRONT STEERING CONTROL ECU) - LHD REPLACE VGRS ECU (FRONT STEERING CONTROL ECU) Click here
    REPLACE VGRS ECU (FRONT STEERING CONTROL ECU) - RHD REPLACE VGRS ECU (FRONT STEERING CONTROL ECU) Click here